diff --git a/StorageBundle/DependencyInjection/Configuration.php b/StorageBundle/DependencyInjection/Configuration.php
index 0f1559e..22db9e0 100644
--- a/StorageBundle/DependencyInjection/Configuration.php
+++ b/StorageBundle/DependencyInjection/Configuration.php
@@ -20,10 +20,18 @@ class Configuration implements ConfigurationInterface
         $root->useAttributeAsKey('storage_name')
             ->prototype('array')
                 ->children()
-                ->scalarNode('type')->end()
+                    ->scalarNode('type')->end()
                     ->scalarNode('bucket')->end()
                     ->scalarNode('region')->end()
                     ->scalarNode('endpoint')->end()
+                    ->arrayNode('credentials')
+                        ->children()
+                            ->scalarNode('key')->end()
+                            ->scalarNode('secret')->end()
+                        ->end()
+                    ->end()
+                    ->scalarNode('version')->end()
+                    ->scalarNode('path')->end()
                 ->end()
             ->end()
         ->end();